No torque wrench. reliance on a cheap / out of adjustment one can lead you to breaking bolts out of a false sense of security.
Good point but lets say you need to tighten up your bottom bracket to 35 – 41 Nm and you use a ‘cheap’ torque that has an accuracy of +/- 10%. If you tighten the Bottom bracket to 38 NM you’ll be tightening the bottom bracket to either 34.2 or 41.8 which must be better then either having the bottom bracket way under the recommended torque specifications or over tightening it and doing damage to your frame.
Interestingly I was taught that allen keys are the respective size in order to allowing for for the correct force to be used and you should use one hand then until the bolt stops moving then ‘nip’ it just a touch more.
I suppose I’m just interested at how many people actually use / own torque wrenches as I’ve toyed with the idea of getting one (and expanding the tool selection) so that I dont have to keep going to the bike shop everytime I need do something like tightening up my cranks or bottom bracket.